The cement output of the mechanical shaft kiln accounts for 70% of my country's cement output. The listed magnesia carbon brick company is one of the industrial kilns that consume a lot of energy in the building materials industry in my country. High energy consumption, low output, and unstable quality. Therefore, improving quality and output and reducing energy consumption are important ways to improve the economic benefits of mechanical shaft kiln cement enterprises, and energy conservation is particularly important. With the rapid development of the cement industry in the past ten years, the number of projects that have been transformed from ordinary mechanized vertical kilns to modern mechanical vertical kilns has gradually increased, and the requirements for refractory and thermal insulation materials have become higher and higher.

In the past, the specifications of ordinary mechanized vertical kilns were Φ32×11.5m. The refractory bricks used were high-alumina phosphate bonded non-fired bricks, and the heat preservation material used blast furnace granulated slag. The effect was very unsatisfactory and there were many drawbacks: first, refractory Bricks have short service life and low refractoriness. The bell-mouth bricks are replaced in August during the peak season of cement every year. They can only be used for 6 months. The kiln lining bricks will corrode into convex and concave surfaces. The sintering clinker fractures in the center and the edges, and the occurrence of fire and flame-throwing cave dwellings, have severely damaged the thermal system of the kiln surface and caused problems such as low output and poor quality. Safety production is threatened, and at the same time, energy is increased. Consumption. Due to poor insulation, a large amount of heat energy is transferred to the outside of the kiln. The thermal conductivity is about 0.8~1.0W/(m·K). The clinker coal consumption increases to 1250~1300 kcal/kg clinker, while the output is only Hovering between 13～13.5?t/h. Due to the low output, the power consumption also increased to 65kW·h/ton clinker. The waste phenomenon is very alarming, which seriously affects the development of the enterprise, and has no competitiveness in the market, and even cannot survive.

Application of energy-saving refractories in modern shaft kilns

In order to improve the economic efficiency of the enterprise and make the shaft kiln continuously improve in technology, quality and output, the ordinary shaft kiln has been transformed. The core of the transformation is to replace refractory bricks, strengthen the heat preservation of the kiln body, refit and add inverted horns in terms of the working conditions of the kiln, adjust the height of the horns, change the iron bricks from flat iron lining boards to broken air guide bricks, replace new distributors and The energy-saving discharge tower grate can improve the service life of kiln lining bricks and the heat preservation effect of the kiln, and achieve the goals of energy saving, high yield and high quality.